Quite possible. The issue then would be how to toast it that long without burning the bread. I suspect if you use an infrared toaster and have lots of dry air

Quite possible. The issue then would be how to toast it that long without burning the bread. I suspect if you use an infrared toaster and have lots of dry air flowing through the toaster you might be able to do it. What I don't know is if doing this might ruin the toast. Removing all the moisture might leave it more like a crouton than a piece of toast.